Naphtha cleaning plant



A g-18,1936. RC. BAXTER Em 2 051,12

NAPHTHA CLEANING PLANT Filed Jan. 5, 19:55 Z SheetS-Sheet 1 w I F152 III III II 1 RC. Barter L.D.5tewart INVENTORS ATTORNEY.

Aug. 18, 1936. R. c. BAXTER ET AL NAPHTHA CLEANING PLANT Filed Jan. 5. 1955 2 sheets-srie tz ooo'oooooooooooooooo' OOOOOOOOOOOOOOOOOO' m w H m m XWE 0 a em m 5 f MN m Patented Aug. 18, 1936 UNITED STATES PATENT OFFICE NAPHTHA CLEANING PLANT Richard C. Baxter and Leon D. Stewart, Electra, Tex.-

Application January 3, 1935, Serial No. 282

3 Claims. (01. 210-134) This invention has relation to apparatus for cleaning fluids and is designed more particularly to provide an appliance for purifying naphtha which is continuous in operation, the fluid being 5 continuously circulated and the impurities separated therefrom in circuit.

The invention further provides an apparatus of the nature aforesaid which is compact, positive in operation, and readily accessible to facilitate renewals at a small cost.

The invention also contemplates a novel filter through which the fluid has a reverse circulation,

' upwardly and downwardly, whereby impurities are quickly removed, both by filtration and precipitation, and subsequently drawn off as desired.

The invention furthermore provides a filter having a bottom forming a chamber above which is disposed filtering media in layers, a pipe arranged to deliver the fluid to be cleaned in jets against the inclined sides of the said chamber, and a valved drain connected with the lower portion of the chamber to admit 'air to cause a gurgling action of the fluid in its passage through the filter.

While the drawings illustrate a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements, the design may be varied and changes in the minor details of construction may be resorted to within the scope of the invention as claimed without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which:

Figure 1 is a vertical section of the filter on the line l-l of Figure 2, showing portions of the circulatory pipe system.

Figure 2 is a plan section on the line 2-2 of Figure 1.

Figure 3 is a horizontal sectional view of the trap on the line 33 of Figure 1.

Figure 4 is a side view of a naphtha purifying plant illustrative of an embodiment of the invention.

Figure 5 is a plan section on the line 5--5 of Figure 6.

Figure 6 is a vertical section of the trap on the line 65 of Figure 5.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawings by like reference characters.

The apparatus includes a washer 35 of approved type best suited for the particular use. A filter and a trap conveniently located, preferably with the washer 35 therebetween, are connected with the washer by a system of piping for circulating the naphtha or other fluid to be cleaned; 5 1

This system includes pipes 30, 39, 32 and 38. A pump 31 connected with the pipes 32 and 38 causes positive circulation of the naphtha or other fluid through the washer, filter, and trap.

A suitable motor 35 is connected with the pump 31 10 for operation thereof. The pipes 32 and 30 have sights 33 and 34 for conveniently observing the fluid circulating therethrough. 1

The filter consists of a shell or casing 1 having a conical bottom 29 and closed by a cover 8 15 fastened by bolts I l and carrying a pressure gage, 9.. The pipe 35 connects with the apex of the conical bottom 29 and with the washer 35; A screen, 25 is disposed within the lower portion of the shell I about in the plane of the juncture of the conical bottom '29 therewith. Cotton waste, or like material 24 is supported upon the screen 25. An annular pipe 26 is disposed beneath the screen 25. adjacent thereto and is provided in its bottom side with openings 21 for 25 delivery of the fluid in jets against the upper portion of the conical bottom 29.

A filtering cartridge is located within the shell 1 and consists of a shell l8 having a conical bottom 23 and closed by a cover l4 secured by bolts I2 30 and provided with handles l3. The pipe 30 is extended and threaded to the apex of the conical bottom 23. A fine screen 22 resting upon the bottom 23 supports filtering media in layers l6, l1,

I9, 20 and 2|. The layer 2| consists of crushed 35 charcoal, the layer 20 of diatomaceous earth, the layer l9 of a mixture of fullers earth and darco, about half of each, the layer ll of fullers earth and the layer [6 of cotton waste tightly packed. The cartridge, being removable, may be renewed 4.0 in whole or in part as occasion may require. Openings I5 are formed in the sides of the shell I8 near the top, for the inflow of fluid from the shell IS.

The trap consists of a shell 40 closed by a cover 45 4|. A can 44 is disposed within the shell 40 and one side thereof is perforated throughout its extent, as indicated at 42, the other side being imperforate. Handles 43 applied to the can near 7 the top thereof facilitate its handling. The per- 50 forated side 42 of the can 44 is arranged facing the connection of the pipe 39 with the shell 40 and can 44. The imperforate side of the can 44 is disposed opposite the side of the shell 40 to which the pipe 38 is attached. 55

The filter is usually supported on legs 3| and has a drain pipe 30 coupled to the lower portion of the conical bottom .29. A valve 28 in the length of the drain pipe 30 regulates the disa charge of sediment orcuts off the discharge, as

desired. It will be observed that the apparatus is compact, simple in arrangement, readily accessible for inspection, renewals and other purposes,

- tageous to add a smallamount of water to the;

and continuous in a cycle of operation since the fluid is' positively circulated by means of the pump 31. In practice, it has been found advandiatomaceous layer of earth 20 to moisten it,

whereby to absorb any water dye pigments in the naphtha and catch dust and foreign material held in solution.

It is assumed that the asher 35, filter I, trap 40 and pipe system are filled with the-naphtha to be cleaned. When operating the pump 31, the fluid is positively'circulated and the'impurities removed from the naphtha bythe combinedfac ation of the filter, trap-and washer. The fluid flows upwardly through the shell 1, thence through the openings l into, and downwardly throughzthe shell l8 and filtering mediatherein,

' thence through the pipe 30 into the washer and outwardly from the washer through the pipe 39 'into the trap back into the: filter throughithe pipe 32. The fluid is delivered into .thej'annular pipe '26 and is'discharged in jets. therefrom through the openings 21; These'jets" impinge air enters the filter and passesup'wardly there- 1 through,,causingia gurgling. action and effecting."

a-backlwash'which assists'mat'erially in sepa-i V 'rating the sediment from the cotton waste 24.,

Having thus describedthe invention, what is claimed as new is: a I

1. Fluid cleaning apparatus comprising inner and outer shells having conical bottoms forming chambers, the outer shell having a lower inlet 5 and the inner shell having a bottom outlet and a top inlet and spaced from the outer shell to admit of the fluid flowing upwardly through the outer shell, thence downwardly through the inner shell, screens within the shells supported above 10 the bottoms thereof, cotton waste filtering material on the screen of the outer shell, filtering materialin layers on the screen of the inner shell, said layers including charcoal, diatomaceousearth, amixture of fullers'earth and darco,

fullers earth and cotton waste.

a 2. Fluid cleaning apparatus comprising an a 'outer shell having, a .conical bottom forming a' tapering chamber, with which a valved drain connects, a screen above the tapering chamber,

a perforated annular inlet pipe below and adjacent the screen, cotton waste filtering material on the screen, a removable cartridge withinthe said outer shell and spaced therefrom and havinga.

tapering bottom and an .upper fiuid inlet and an outlet pipe leading from the bottom of the inner r shell through the bottom of the outer shell.f

3. A filtercomprisingan outer shell having ,a conical bottom. and :closed. by a removable cover,

an inner shell having a tapering bottom, screens 7 within the lower portion of the, shells, filtering material. supported on" the screens, the filtering material, in the inner shell, being in layers and 7 consisting of cotton waste, .fullers earth, darcoy and diatomaceous-earth', an outlet pipe connected with the apex of the inner .shells bottom, an-annular perforate pipe below,- and, adjacent the screen of the outer shellto deliver theinflowing fluid in jets, andia valved drainconnected with the lower portionaofflthe conical bottom of the outerishell; 1 I or a RICHARD C. BAXTER,.

LEON D.'STEWART. 

